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$400+ Cheap flights from Ontario (ONT) to Northern Ireland

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BFS
Mar 8 — Mar 151
Sun 3/8
Sun 3/15
1 adult, Economy
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Cheap flight deals from Ontario to Northern Ireland

Cheapest flights from Ontario to Northern Ireland
Explore the most affordable flight options available from Ontario to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 6, 2026.

This oojo deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/144:52 pm
ONT
-
BHD
2 stops18h 03m
British Airways
Sun 4/191:10 pm
BHD
-
ONT
2 stops16h 49m
British Airways
Deal found 2/5$837
This British Airways deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/410:56 am
ONT
-
BHD
2 stops21h 39m
British Airways
Sun 3/86:30 am
BHD
-
ONT
2 stops24h 22m
British Airways
Deal found 2/3$845
This British Airways deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:00 am
ONT
-
BHD
2 stops20h 15m
British Airways
Sun 3/16:30 am
BHD
-
ONT
2 stops23h 59m
British Airways
Deal found 2/3$1,020
This Priceline deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/204:52 pm
ONT
-
BHD
2 stops18h 33m
British Airways
Fri 4/249:30 am
BHD
-
ONT
2 stops20h 29m
British Airways
Deal found 2/5$1,058
This Priceline deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/134:52 pm
ONT
-
BHD
2 stops18h 33m
British Airways
Fri 4/179:30 am
BHD
-
ONT
2 stops21h 06m
British Airways
Deal found 2/5$1,301
This Cheapflightsfares deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1712:46 pm
ONT
-
BHD
2 stops16h 49m
British Airways
Sun 6/281:10 pm
BHD
-
ONT
2 stops16h 41m
British Airways
Deal found 2/3$3,113
This oojo deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/124:59 pm
ONT
-
BHD
2 stops17h 16m
British Airways
Sat 9/199:35 am
BHD
-
ONT
2 stops20h 15m
British Airways
Deal found 2/4$6,010

Find flight deals from Ontario to Northern Ireland

Keep the following information in mind while searching for Ontario to Northern Ireland flight deals. Data was last updated February 6, 2026.

Round-trip from

$837
(oojo)

One-way from

$400
(oojo)

Popular in

June

Cheapest in

October

Average price

$685
From Ontario to Northern Ireland
Search Deals
One-way flight from Ontario to Northern Ireland
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($184 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Northern Ireland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 6, 2026.
Use the filters below to find and compare flights from Ontario to Northern Ireland that are best for you.

Fly from

Ontario

Fly to

Northern Ireland

Route

Depart

Return

Price

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Tue 4/14

4:52 pm-6:55 pm

2 stops18h 03m

Belfast City

Sun 4/19

1:10 pm-9:59 pm

2 stops16h 49m

$837

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 3/4

10:56 am-4:35 pm

2 stops21h 39m

Belfast City

Sun 3/8

6:30 am-10:52 pm

2 stops24h 22m

$845

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 2/25

6:00 am-10:15 am

2 stops20h 15m

Belfast City

Sun 3/1

6:30 am-10:29 pm

2 stops23h 59m

$1,020

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 4/20

4:52 pm-7:25 pm

2 stops18h 33m

Belfast City

Fri 4/24

9:30 am-9:59 pm

2 stops20h 29m

$1,058

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 4/13

4:52 pm-7:25 pm

2 stops18h 33m

Belfast City

Fri 4/17

9:30 am-10:36 pm

2 stops21h 06m

$1,301

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 6/17

12:46 pm-1:35 pm

2 stops16h 49m

Belfast City

Sun 6/28

1:10 pm-9:51 pm

2 stops16h 41m

$3,113

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 2/18

5:02 pm-4:35 pm

2 stops15h 33m

$400

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Thu 5/7

4:52 pm-6:45 pm

2 stops17h 53m

$454

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 2/11

12:41 pm-4:50 pm

2 stops20h 09m

$517

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Sun 2/15

5:02 pm-6:40 pm

2 stops17h 38m

$535

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/5

Showing 1-10 of 12 results
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Best time to book a flight from Ontario to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Northern Ireland

What is the cheapest month to book a flight from Ontario to Northern Ireland?

Currently, March is the cheapest month in which you can book a flight from Ontario to Northern Ireland (average of $585). Flying from Ontario to Northern Ireland in June is currently the most expensive (average of $927). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Northern Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Northern Ireland?

    For a flight from Ontario to Northern Ireland, you will be flying from Ontario. Ontario (ONT) is just 3.1 mi from the center of the city.

  • How long is the flight from Ontario to Northern Ireland?

    For as low as $837, British Airways can have you in Northern Ireland from Ontario in 18h 03m. The distance between Ontario and Northern Ireland is about 5095 mi.

  • Can I find deals for flights from Ontario to Northern Ireland that include hotel bookings?

    Yes. In addition to deals on Ontario to Northern Ireland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Northern Ireland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Northern Ireland.

  • Can I find deals for business class flights from Ontario to Northern Ireland?

    Yes. Cheapflights offers flight deals from Ontario to Northern Ireland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Northern Ireland?

    Currently, March is the cheapest month in which you can book a flight from Ontario to Northern Ireland (average of $585). Flying from Ontario to Northern Ireland in June is currently the most expensive (average of $927). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Ontario to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.
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